Disgusting customer service by FORD!

I bought a Ford Kuga at Dundee Ford garage.5 months down the line,it had a bad noise and was asked to bring it in the following week. It was checked and had three problems including oil leak.They needed R9 500,and said they won't start fixing it before receiving full payment .I paid and left the car on the 29th of July and they said the parts were unavailable till after 2weeks.I came after two weeks and they said they were still waiting I must come back after another 2 weeks, when I came back they needed another two weeks because they were waiting for a special tool to open the car...My God when I came back they now said they need another two weeks because they were fixing the aircon..While I was up and down Thokozani the manager has been very rude and unprofessional, and said I must run and ask customer care and not him. I reported to customer care but they said they have got nothing to do with it since it is between the dealer and the customer. It means the 'sick car' was sold to me without being checked, many parts were damaged.They phoned today on the 13th of Sept to say it is finished but I must add another R9 500 which was not our agreement otherwise I will not get it. This has been the most traumatic experience of my life and has also affected my health and my relationship with my kids and husband negatively. Please help me because I don't know who to turn to anymore.